Dual-purpose scale assembly



W; P. CLARKSON DUAL PURPOSE SCALE ASSEMBLY l Fel. 19, 1946.

Filed Oct. 17, 1944` M//MM/.D/arrsof/ A l Inventor TWHMW I Patented Feb. 19, 1946 DUAL-PURPOSE SCALE ASSEMBLY William P. Clarkson, Corpus Christi, Tex., as-

. signor of fifty per cent to T. Buford Nicholson,

l Corpus Christi, Tex.

Application October 17, 1944', Serial No. 559,041

4 claims. ,torse- 103) f This invention relates to novel and improved means for conveniently assemblingand holding a pairA of companion scales or ruler-equipped scales, Iwhereby to provide an easier, faster and more accurate way to spot locations in the performance of varied measuring and marking jobs.

The invention is to be known as a dual-purpose scale holder or scale assemblage and has to do with reliable and practicable means for holding the two scales at right angles to each other and shifting same to different predetermined relationships to enable the user to achieve desired aims with expediency and accuracy.

.More particularly, in carrying out the principles of the invention, I use a regular triangular scale and a flat-type double .beveled scale, one end of the latter abutting the coacting edge of the triangular scale, and there being special adapter means to support the ilat scale in an inclined position and to slidably connect the maty ing end with the triangular scale.

Other features and advantages will become more readily apparent from Vthe following description and the accompanying illustrative drawing. f

In the drawing, wherein like numerals are em- A ployed to designate like parts throughout the regular triangular scale-equipped ruleri's denoted l by the numeral 5 this being provided with a suitably graduated scale 6 and above said scale with the usual running groove or channel 1. I mention this part 1 because it constitutes a key-way for the adaptor means, as will be hereinafter described. The double bevel of the conventional at ruler orvscale is indicated at 8 and, in accordance with this invention one end is mitered and thus suitably beveled as at 9 to conformably contact the scale 6, vthis to associate the scale 6 with the scale I0 on said ruler 8.

The adapter for associating and adjustably utilizin-g the two scales or rulers together is denoted generally by the numeral Il. This comprises an elongated base I2 of suitable material and dimensions, the same being generally rectangular in cross-sectional form rand having its inner end beveled as at I3 (see Figure 3) to slidably contact the coacting bevel on the main scale 5. As shown in Figure 2, one longitudinal edge of this base is rabbeted and the bottom of the rabbet is inclined outwardly and downwardly to form an inclined ledge I4 which constitutes a seat for accommodating and properly disposing the scale 8 in relation to the scale 5. A substantially T-shaped xture is provided for assembling the parts. The shank I5 is superimposed onand fastened as at I6 to the inner end of the base I2.

The haring head portion I1 projects beyond the I2 and has its free end bent downwardly and forming a retention linger 2I of appropriate resiliency. This bears upon and holds the ruler 8 on the ledge I4 as brought out in Figure 2 of the drawing. Thus, the adapter II, as a unit, is temporarily coupled to the triangular scale or ruler 5 and has the ruler 8 spring-clipped thereon. Consequently, the two rulers are brought together in mating right angular relationship permitting the two scales 6 and III to be shifted and brought into varying relationships for multiple purpose calculation, describing, marking and other results attainable through the use of such Van instrumentality.

It is thought that persons skilled in the art to which the invention relates will be able to obtain a clear understanding of the invention after considering the description in connection with the drawing. Therefore, a more lengthy description is regarded as unnecessary.

Minor changes in the shape, size and arrangement of details coming within the field of invention claimed may be resorted to in actual practice, if desired.

I claim:

1. In a structural assemblage of the class described, a base forming an adapter having an elongated shoe at one end for slidable coaction with an existing groove in a stock triangular scale, said Ibase being provided along one side with an outwardly and downwardly inclined ledge, the latter being adapted to accommodate a conventional at scale, and a spring-clip on said base adapted to overlie and to hold the second scale on the ledge.

2. An adapter for use and association with scales of the class described comprising an elongated base, a T-shaped fixture having its shank portion secured to the top of the base and its head portion projecting beyond the base and fashioned into a longitudinally extending bead, said bead `constituting an assembling and shifting shoe, said base being provided along one side with an inclined portion constituting a ruler-seating ledge, and a spring-clip on said base overlying the ledge.

3. vAn adapter for use in association With two coacting scales of the class described comprising a horizontally elongated base having an elongated shoe at one end thereof for quick separable sliding coaction With an existing groove in a conventional triangular scale, said base being provided along one side with an outwardly 20 and downwardly inclined ledge, the latter being adapted to accommodate a conventional flat scale, and means on said base to yieldably overlie and removably hold said second scale on said ledge.

4. An adapter for use in association With scales of the class described comprising an elongated base, a T-shaped fixture having a shank portion secured to the top of the base and a head portion projecting beyond the base, said head portion being fashioned into a longitudinally extending bead, said bead constituting an assembling and shifting shoe for coaction with an existing groove in a conventional triangular scale, said base being provided along one side with a portion constituting a ruler-seating ledge, and resilient means on said base overlying said ledge and adapted to hold said ruler removably in place on the ledge.

WILLIAM P. CLARKSON. 

